import re

NICK_NAME = re.compile(r'^[\u4e00-\u9fa5a-zA-Z0-9_]{4,16}$')
EMAIL = re.compile(r'^[A-Za-z0-9\u4e00-\u9fa5]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$')
PASSWORD = re.compile('^[a-zA-Z0-9_.@&]{6,20}$')
